insert into table_name (column1,column2,...) select columnx,columny,... from another_table 说明:也可以经过一个子查询(subquery)把别的表格的资料填入。 2、查询资料: 基本查询 select column1,columns2,... from table_name 说明:把table_name 的特定栏位资料全部列出来 select * from table_name ...
insert into table_name (column1,column2,...) select columnx,columny,... from another_table 说明:也可以经过一个子查询(subquery)把别的表格的资料填入。 2、查询资料: 基本查询 select column1,columns2,... from table_name 说明:把table_name 的特定栏位资料全部列出来 select * from table_name ...
INSERT INTO table_name (column1,column2,…) SELECT columnx,columny,… FROM another_table 说明:也能经过一个子查询(subquery)把别的表格的资料填入。 2.查询资料: 基本查询 SELECT column1,columns2,… FROM table_name 说明:把table_name 的特定栏位资料全部列出来 SELECTFROM table_nameWHERE column1 =...
/home/stolze $ db2 "INSERT INTO test_table VALUES ( readFile( '/home/stolze/test_file' ) )" DB20000I The SQL statement completed successfully. /home/stolze $ db2 "SELECT SUBSTR(text, 2, 3) FROM test_table" 1 --- est 1 record(s) selected. 1. 2. 3. 4. 5. 6. 7. 8. 9....
TheFOR n ROWS formof the INSERT statement inserts multiple rows into the table or view using values provided or referenced. Although not required, the values can come from host-variable arrays. This form of INSERT is supported in SQL procedure applications. However, because host-variable arrays ...
ALTERTABLEtable_name DROPPRIMARYKEY(column_name) 说明:把主键的定义删除。 3.建立索引 CREATEINDEXindex_nameONtable_name(column_name) 说明:对某个表格的栏位建立索引以增加查询时的速度。 4.删除 DROPtable_name DROPindex_name
sql INSERT INTO employees (employee_id, name) VALUES (1, NULL); -- 假设name列定义为NOT NULL -904 57011 说明:指定的资源不可用。 示例: sql -- 尝试在资源不足的情况下执行大量数据处理的查询 SELECT * FROM large_table JOIN another_large_table ON large_table.id = another_large_table.id; ...
A table that contains a set of rows thatDb2selects or generates, directly or indirectly, from one or more base tables in response to an SQL statement. Unlike a base table or a temporary table, a result table is not an object that you define using a CREATE statement. ...
1.建表格: CREATE TABLE table_name( column1 DATATYPE [NOT NULL] [NOT NULL PRIMARY KEY], column2 DATATYPE [NOT NULL], …) 说明: DATATYPE是资料的格式,详见表。 NUT NULL可不能允许资料有空的(尚未有资料填入)。 PRIMARY KEY是本表的主键。 2.更改表格 ALTER TABLE table_name ADD COLUMN column...
+218 01537 因为SQL语句引用一个远程对象，不能为该SQL语句执行EXPLAIN +219 01532 命名的PLAN TABLE不...